lkml.org 
[lkml]   [2019]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v1 03/31] docs: lp855x-driver.txt: convert to ReST and move to kernel-api
Date
This small file seems to be an attempt to start documenting
backlight drivers.

It contains descriptions of the controls for the driver
with could sound as an somewhat user-faced description, but
it's main focus is to describe, instead, the data that should
be passed via platform data and some driver-specific stuff.

While this is not part of the driver-api book, mark it as
:orphan:, in order to avoid build warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
---
Documentation/backlight/lp855x-driver.rst | 83 +++++++++++++++++++++++
Documentation/backlight/lp855x-driver.txt | 66 ------------------
MAINTAINERS | 2 +-
3 files changed, 84 insertions(+), 67 deletions(-)
create mode 100644 Documentation/backlight/lp855x-driver.rst
delete mode 100644 Documentation/backlight/lp855x-driver.txt

diff --git a/Documentation/backlight/lp855x-driver.rst b/Documentation/backlight/lp855x-driver.rst
new file mode 100644
index 000000000000..62b7ed847a77
--- /dev/null
+++ b/Documentation/backlight/lp855x-driver.rst
@@ -0,0 +1,83 @@
+:orphan:
+
+====================
+Kernel driver lp855x
+====================
+
+Backlight driver for LP855x ICs
+
+Supported chips:
+
+ Texas Instruments LP8550, LP8551, LP8552, LP8553, LP8555, LP8556 and
+ LP8557
+
+Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+
+Description
+-----------
+
+* Brightness control
+
+ Brightness can be controlled by the pwm input or the i2c command.
+ The lp855x driver supports both cases.
+
+* Device attributes
+
+ 1) bl_ctl_mode
+
+ Backlight control mode.
+
+ Value: pwm based or register based
+
+ 2) chip_id
+
+ The lp855x chip id.
+
+ Value: lp8550/lp8551/lp8552/lp8553/lp8555/lp8556/lp8557
+
+Platform data for lp855x
+------------------------
+
+For supporting platform specific data, the lp855x platform data can be used.
+
+* name:
+ Backlight driver name. If it is not defined, default name is set.
+* device_control:
+ Value of DEVICE CONTROL register.
+* initial_brightness:
+ Initial value of backlight brightness.
+* period_ns:
+ Platform specific PWM period value. unit is nano.
+ Only valid when brightness is pwm input mode.
+* size_program:
+ Total size of lp855x_rom_data.
+* rom_data:
+ List of new eeprom/eprom registers.
+
+Examples
+========
+
+1) lp8552 platform data: i2c register mode with new eeprom data::
+
+ #define EEPROM_A5_ADDR 0xA5
+ #define EEPROM_A5_VAL 0x4f /* EN_VSYNC=0 */
+
+ static struct lp855x_rom_data lp8552_eeprom_arr[] = {
+ {EEPROM_A5_ADDR, EEPROM_A5_VAL},
+ };
+
+ static struct lp855x_platform_data lp8552_pdata = {
+ .name = "lcd-bl",
+ .device_control = I2C_CONFIG(LP8552),
+ .initial_brightness = INITIAL_BRT,
+ .size_program = ARRAY_SIZE(lp8552_eeprom_arr),
+ .rom_data = lp8552_eeprom_arr,
+ };
+
+2) lp8556 platform data: pwm input mode with default rom data::
+
+ static struct lp855x_platform_data lp8556_pdata = {
+ .device_control = PWM_CONFIG(LP8556),
+ .initial_brightness = INITIAL_BRT,
+ .period_ns = 1000000,
+ };
diff --git a/Documentation/backlight/lp855x-driver.txt b/Documentation/backlight/lp855x-driver.txt
deleted file mode 100644
index 01bce243d3d7..000000000000
--- a/Documentation/backlight/lp855x-driver.txt
+++ /dev/null
@@ -1,66 +0,0 @@
-Kernel driver lp855x
-====================
-
-Backlight driver for LP855x ICs
-
-Supported chips:
- Texas Instruments LP8550, LP8551, LP8552, LP8553, LP8555, LP8556 and
- LP8557
-
-Author: Milo(Woogyom) Kim <milo.kim@ti.com>
-
-Description
------------
-
-* Brightness control
-
-Brightness can be controlled by the pwm input or the i2c command.
-The lp855x driver supports both cases.
-
-* Device attributes
-
-1) bl_ctl_mode
-Backlight control mode.
-Value : pwm based or register based
-
-2) chip_id
-The lp855x chip id.
-Value : lp8550/lp8551/lp8552/lp8553/lp8555/lp8556/lp8557
-
-Platform data for lp855x
-------------------------
-
-For supporting platform specific data, the lp855x platform data can be used.
-
-* name : Backlight driver name. If it is not defined, default name is set.
-* device_control : Value of DEVICE CONTROL register.
-* initial_brightness : Initial value of backlight brightness.
-* period_ns : Platform specific PWM period value. unit is nano.
- Only valid when brightness is pwm input mode.
-* size_program : Total size of lp855x_rom_data.
-* rom_data : List of new eeprom/eprom registers.
-
-example 1) lp8552 platform data : i2c register mode with new eeprom data
-
-#define EEPROM_A5_ADDR 0xA5
-#define EEPROM_A5_VAL 0x4f /* EN_VSYNC=0 */
-
-static struct lp855x_rom_data lp8552_eeprom_arr[] = {
- {EEPROM_A5_ADDR, EEPROM_A5_VAL},
-};
-
-static struct lp855x_platform_data lp8552_pdata = {
- .name = "lcd-bl",
- .device_control = I2C_CONFIG(LP8552),
- .initial_brightness = INITIAL_BRT,
- .size_program = ARRAY_SIZE(lp8552_eeprom_arr),
- .rom_data = lp8552_eeprom_arr,
-};
-
-example 2) lp8556 platform data : pwm input mode with default rom data
-
-static struct lp855x_platform_data lp8556_pdata = {
- .device_control = PWM_CONFIG(LP8556),
- .initial_brightness = INITIAL_BRT,
- .period_ns = 1000000,
-};
diff --git a/MAINTAINERS b/MAINTAINERS
index fa236f3f5979..28c3b926555e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15828,7 +15828,7 @@ F: sound/soc/codecs/isabelle*
TI LP855x BACKLIGHT DRIVER
M: Milo Kim <milo.kim@ti.com>
S: Maintained
-F: Documentation/backlight/lp855x-driver.txt
+F: Documentation/backlight/lp855x-driver.rst
F: drivers/video/backlight/lp855x_bl.c
F: include/linux/platform_data/lp855x.h

--
2.21.0
\
 
 \ /
  Last update: 2019-06-12 20:40    [W:0.123 / U:2.524 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site